<p>The packages included in Tails are carefully tested for security. Installing additional packages might break the security built into Tails. For example, installing OpenVPN might modify the firewall rules that Tails uses to force network traffic to go through Tor.</p>
Tails already includes language packages and dictionaries for Arabic, German, Spanish, Farsi, French, Hindi, Bahasa Indonesia, Italian, Portuguese, Russian, Turkish, and Simplified Chinese.
[List of available *LibreOffice* language packages](https://packages.debian.org/search?keywords=libreoffice-l10n&searchon=names&suite=stable§ion=all)
[List of available *Thunderbird* language packages](https://packages.debian.org/search?keywords=thunderbird-l10n&searchon=names&suite=stable§ion=all)